i7 860 - MSI P55 - GD80 issues

[Meco]

hi chaps.

im having few problems with my MSI P55 GD80 and i7 860

i am currently running at 4011 mhz but it is unstable like hell..

RIG:
Intel Corei7 860
MSI P55 - GD80
2 x 2 GB G.Skill RIPJAW (9-9-9-27) @ 7-7-7-21
2 x XFX 4770

Voltages:
CPU Vcore: 1.40000V
CPU VTT: 1.360V
CPU PLL: 1.810V
PCH 1.05V: 1.065V
DRAM: 1.620V

BLCK: 191
Ratio: 21x

best regards
meco

[zsamz_]

raise pll to 1.9 chek v-core on load 1.4 load gets me to 4.1
i was thinkin of msi for p55 nice bundle + board looks good
but i have no faith in them as far as bios goes

gl

[Dahaka]

1.95v on PLL, try that.

[Leeghoofd]

7-8-7-20 ram timings ? up ram voltage to 1.65

[dan7777]

that alot of Vcore to get 4ghz how cum the i7"s take alot less Vcore to get 4.4ghz 1.3 done.

[Leeghoofd]

you apparently never had a sucky 920 :p 4ghz with HT on was 1.45 here lol... it seems quite common to be around 1.4Vcore with many I5/7 S1156 CPU's...

[Meco]

thanks for tips i will try them today, was going to do it yesterday but isp crashed and dident have internet /whine..

- meco

[axffox]

~1.4 vcore is very common with the i7 8XXs for 4GHz. 4GHz also seems to be the average overclock..


raising your PLL is the key to getting your OC stable, give it a try. Set it to 1.9-2.0 and you should be good to go.

[Meco]

im still unstable like hell on 4ghz
i cannot determine if mine ram are running low on power or what they are..

- meco

[Leeghoofd]

did you up the ramvoltage or not ? did you try more relaxed ram timings ? are you running turbo on or not ?

[axffox]

If your ram is specified for 1.65, set it to 1.67 or 1.65. 1.62 could mean the difference of being unstable or stable.



Up the VTT a bit, 1.36 might be a bit low. It took me 1.4 for 4GHz with my ram @ 1,600.

[Meco]

did you up the ramvoltage or not ? did you try more relaxed ram timings ? are you running turbo on or not ?

yes i did pump the power upto 1.75v

and no im not running turbo mode

- meco

[axffox]

that's wayy too much. Put it back to 1.67 or so, 1.75 would probably be too much for those clocks on the ram.

[Meco]

i got it. a sweet spot @ 4200 mhz

CPU = 1.449
VTT = 1.439
PLL = 1.850
DRAM = 1.775 @ 7-7-7-21

http://valid.canardpc.com/show_oc.php?id=818585

/flex & thanks for the help

- meco

[zsamz_]

lower the vdimm mecco
1.7 is absolute max for 24/7 use
cant you run 2000mhx cas 9 1.65v
i can run 2000mhz cas7 with hyperx 1.65v but its not a big deal